Facing-tool.



,-UiviTEn tirarse GEORGE '-i. naiss, or: nAMiLTO'N, omo, AssieNoe ToNiLEs-BEMENr-POND oonriinngoi JERSEY CITY,

NEW JERSEY.

FACINGTOL.

Specification of Letters Patent.

Patented aan. ai, ieee;

Application filed April' Z9. 1907.' Serial No'. 370.793

vationof the sainefpart vertical section, in

conjunction with a sample piece to be worked upon; and' Fig. 3 ahorizontal sec-' tion ofthe tool.

In the drawing-1, indicates a sai'nple'v piece of work., in this case alieader'for a wateretube boiler, to bc faced, and also bored,

the piece consisting of a hollow casting: 2, a

circular opening in the tolp of the casting,

A this` opening notnecessari y to be'b'ored: 3,

the to .of the casting, to be accurately faced aroun the opening 2 :'4,a circular Aopening in the lower partof the casting, concentric with andof smaller diameter than opening 2, the opening 4 to be bored: 5, thetool har, the saine being adapted to be carried and rotated by anysuitable machine as, for instance, any suitable drilling or boringmachine arranged to feedI the tool bar to the worker, alternatively, tofeed the work relative to the tool bar: 6, a ybar cutter secured-in aniort-isc across the toolbar, this cutter being a boring cutter'suitedto the diameter of openingd: 7, a seti-screw for 4securing this cutterin the tool bar: 8, a bar cutter secured in' a iiiortise extendingacross the 'tool bar, this cutter being a facing cutterl and having alength suited to vthe proper facing of top 3 of the casting, thedistance between bai" cutters 6 and 8 being such that cutter 46 maycon'iplete its work in boringl 'the opening 4 beforev the cutter Sreaches the top ofthe casting to be gin work thereon: 9, a set-screw forsecuring cutter 8 in the tool bar: l0, a flat faced milling collarsecured to -the-tool bar 'above bar cutter-8, this milling collar ttingsnugly'onthe tool barI andV having its bore eccentric to' its periphery,the diameter of this milling collar being in excess of the diameter ofthe top of the casting which is to be facedzll, the milling teeth on thelower rim of the mill. ing collar: and l2, a key or feather to cause themilling collar to turn with the tool-bar.

in using this device on a piece of work of the character illustrated,har-cutter 6 first bores the opening tand', after this boring has beencompleted, bar cutter 8 is brought down to the face 3 ofthe casting andfaces itbff, this 'cutterdealing with the casting'in its rough form anddealing with thef scale and preliminary heavy work of facing. When thiscutter has done its Work then cutter 8 is removed, by simply looseningset screw 9 and withdrawing the cutter, the cutter 8 and its set-screw 9being entirely free from the milling collar after which the its millingteeth utting the 'final and accurate finish on t e face 3 of thecasting, thus completing the Operation. Opening 2 in the casting, whichmay not need boring, is to be large enough tol permit the cutter 6 topass freely through it.

Milling collar 10 remains the toolbar, being remove only for purposesofrenewal or reparation. 1f the milling collar were concentric, and if.,in its production, a defect, as a slight notch, should be produced inits lower tool face, the chances would be that that defect would extendall the way around tlie'collar and tlie result would be that an annularridge would be formed oii'the face 3, interfering with the desiredaccuracy of face. But, the milling `collar being eccentric, a continuousuci' i of the character referred to might ez-:isf without impairing theaccuracy of the fac; ing for, the circie of the notch being c centric tothe axis of rotation of the eolici, the notch would be at diercnt radialdistances in the various teeth and one tooth (perni anently on millincollar is brought down tothe work,'

rejecting' endw'ise' therefrom, a.

coV grrmly secured to the toobbar above said bar-cutter and havin-geJtoothed 10 sollen-combined substantially as setl fort GEORGE T. RYEISS.Witnesses:

WlLLABD SEE, M.. S. BELDEN.

